US4078936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsion containing two-equivalent yellow coupler
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1976-05-12
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Granted: 1978-03-14
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Expires: 1996-05-12
Abstract
Abstract The two-equivalent yellow coupler having the following formula has an extremely high reactivity, produces an image of high density in color development and causes little fogging and no ground coloration: <IMAGE> wherein Coupl, R1 - R5 and A are as defined hereinafter.
Inventors
- 👤 Kosaku Masuda
- 👤 Mamoru Nakatani
- 👤 Kiyoshi Yamashita
- 👤 Yasushi Usagawa
- 👤 Satoshi Kawakatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535; G03C7/30541
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A light sensitive silver halide emulsion containing a two-equivalent yellow coupler which is represented by the following general formula: ##STR8## wherein Coupl represents a residue of a yellow coupler having an active methine group, A represents O, S, NH or NR in which R represents an alkyl group of 1-3 carbon atoms, aryl group or an alkenyl group, R 1 , R 2 , R 3 , R 4 and R 5 represent hydrogen, halogen atoms, an alkyl group of 1-4 carbon atoms, an aryl group, an alkoxy group of 1-4 carbon atoms, an acyl group, amino group, an aralkyl group, an aralkyloxy group, an aryloxy group, a carboxy group of 1-10 carbon atoms, an acyloxy group of the formula R 6 --CO--O (wherein R 6 is an alkyl group of 1-20 carbon atoms or an aryl group), a carbamoyl group, a sulfonamido group, or an acylamino group, and R 2 and R 3 , or R 3 and R 4 , or R 4 and R 5 may jointly form a ring.
Claim 2
Dependent Claim
173 words
A light sensitive silver halide emulsion containing a two-equivalent yellow coupler which is represented by the following general formula: ##STR8## wherein Coupl represents a residue of a yellow coupler having an active methine group, A represents O, S, NH or NR in which R represents an alkyl group of 1-3 carbon atoms, aryl group or an alkenyl group, R 1 , R 2 , R 3 , R 4 and R 5 represent hydrogen, halogen atoms, an alkyl group of 1-4 carbon atoms, an aryl group, an alkoxy group of 1-4 carbon atoms, an acyl group, amino group, an aralkyl group, an aralkyloxy group, an aryloxy group, a carboxy group of 1-10 carbon atoms, an acyloxy group of the formula R 6 --CO--O (wherein R 6 is an alkyl group of 1-20 carbon atoms or an aryl group), a carbamoyl group, a sulfonamido group, or an acylamino group, and R 2 and R 3 , or R 3 and R 4 , or R 4 and R 5 may jointly form a ring.
Claim 3
Dependent Claim
22 words
A light sensitive silver halide emulsion according to claim 1 wherein the yellow coupler is selected from the group consisting of ##STR9##
Claim 4
Dependent Claim
19 words
A light sensitive silver halide emulsion according to claim 1, wherein R 1 in the general formula is hydrogen.
Claim 5
Dependent Claim
18 words
A light sensitive silver halide emulsion according to claim 3, wherein A in the general formula is oxygen.
Claim 6
Dependent Claim
19 words
A light sensitive silver halide emulsion according to claim 1 containing a two-equivalent yellow coupler having the formula: ##STR10##
Claim 7
Dependent Claim
19 words
A light sensitive silver halide emulsion according to claim 1 containing a two-equivalent yellow coupler having the formula: ##STR11##
Claim 8
Dependent Claim
14 words
A light sensitive silver halide emulsion according to claim 1 containing a formula: ##STR12##
Claim 9
Dependent Claim
19 words
A light sensitive silver halide emulsion according to claim 1 containing a two-equivalent yellow coupler having the formula: ##STR13##
Claim 10
Dependent Claim
27 words
Lightsensitive silver halide emulsion according to claim 1, wherein the molar ratio of the coupler to the silver halide is 1 : 0.01 - 1 : 3.
Claim 11
Dependent Claim
17 words
Color photographic material containing the yellow coupler according to claim 1 in a silver halide emulsion layer.
References Cited (Backward Citations)
US3644498A
Cited
US3839044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |